Heliopolis  (hē-li-op ´ō-lis ) the City of the Sun, or On—the oldest, perhaps, in this land of antiquities—was a sort of sacerdotal and university town, where Herodotus sought the wisest men in Egypt. Here Plato is said to have graduated. Here also lived Potiphar, who bought Joseph the patriarch. It consisted for the most part of temples and colleges; of which nothing now remains but a few isolated mounds, and one extremely ancient Obelisk. At the village of Metariyeh is reputed to be the place where the Virgin, St. Joseph and the infant Jesus stopped, under a sycamore.